diff --git a/src/cc/sudoku.cpp b/src/cc/sudoku.cpp
index 7571d22e4..2d1b4477c 100644
--- a/src/cc/sudoku.cpp
+++ b/src/cc/sudoku.cpp
@@ -3049,3 +3049,8 @@ bool sudoku_validate(struct CCcontract_info *cp,int32_t height,Eval *eval,const
     return eval->Invalid("not enough vouts");
 }
 
+#include <secp256k1.h>
+#include <secp256k1_schnorrsig.h>
+#include <secp256k1_musig.h>
+
+